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The cmake-policies(7) manual explains that the OLD behaviors of all
policies are deprecated and that a policy should be set to OLD only under
specific short-term circumstances. Projects should be ported to the NEW
behavior and not rely on setting a policy to OLD.

CMake Deprecation Warning at CMakeLists.txt:48 (cmake_policy):
The OLD behavior for policy CMP0043 will be removed from a future version
of CMake.

The cmake-policies(7) manual explains that the OLD behaviors of all
policies are deprecated and that a policy should be set to OLD only under
specific short-term circumstances. Projects should be ported to the NEW
behavior and not rely on setting a policy to OLD.

CMake Deprecation Warning at CMakeLists.txt:51 (cmake_policy):
The OLD behavior for policy CMP0045 will be removed from a future version
of CMake.

The cmake-policies(7) manual explains that the OLD behaviors of all
policies are deprecated and that a policy should be set to OLD only under
specific short-term circumstances. Projects should be ported to the NEW
behavior and not rely on setting a policy to OLD.

CMake Deprecation Warning at CMakeLists.txt:54 (cmake_policy):
The OLD behavior for policy CMP0046 will be removed from a future version
of CMake.

The cmake-policies(7) manual explains that the OLD behaviors of all
policies are deprecated and that a policy should be set to OLD only under
specific short-term circumstances. Projects should be ported to the NEW
behavior and not rely on setting a policy to OLD.

The first step in an issue is to read the messages carefully. Two files were created, as you show in the ouput:

See also "/root/gr-gsm/build/CMakeFiles/CMakeOutput.log".
See also "/root/gr-gsm/build/CMakeFiles/CMakeError.log".

The second thing, after looking at these file is to look in google (or Yahoo, or any other search engine of your choice) for solutions, and remember that Kali is based on Debian (testing), that will help expand the results.

The third thing is to describe the issue accurately:
1. What have you done? Different commands and their respective outputs. Like what repo did you clone, what packages did you install? What make/configure/autoconfig commands did you run? And so on.
2. What are the results?
3. What were you expecting?
4. Give any relevant details on the different parts, and show that you've done thorough research before posting.